Which country is the largest producer of Guava?
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Why do the plant closes stomata when it does NOT need carbon dioxide for photosynthesis?
A sound of single frequency is called a
____________ is a cold desert lying in the Great Himalayas.
How many facial bones are there?
Features and habits that help animals to adapt to their surroundings are a result of the process of ______________.
Money market is a market for _______________
Which of the following green house gases has the greatest heat-trapping ability?